Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...267...21a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 1, p. 21-30.
Astronomy and Astrophysics
Astrophysics
34
Astronomical Models, Astronomical Photometry, Galactic Mass, Galactic Structure, Galactic Evolution, Polar Regions, Ring Structures
Scientific paper
We present new photometric and spectroscopic observations of AM 2020-504, the prototype of a poorly known class of Polar Ring (PR) galaxies. The material of the ring has been likely accreted, as indicated by the kinematical decoupling of the inner core of the host galaxy, the different color of the material in the PR and in the galaxy, and the large HI mass, quite unusual for an E galaxy. Photometric and stability arguments suggest that the host galaxy is most probably an oblate spheroid. Using this configuration, we succeed in modeling the morphology of the PR, its surface brightness distribution, and its kinematics, with a self-gravitating ring made up of a series of circular wires precessing in an oblate potential.
Arnaboldi Magda
Capaccioli Massimo
Cappellaro Enrico
Held Enrico V.
Sparke Linda
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